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首页> 外文期刊>RSC Advances >Choline chloride–zinc chloride ionic liquid as a green template for the sol–gel synthesis of mesoporous titania
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Choline chloride–zinc chloride ionic liquid as a green template for the sol–gel synthesis of mesoporous titania

机译：氯化胆碱-氯化锌离子液体作为介孔二氧化钛溶胶-凝胶合成的绿色模板

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Utilization of organic templates for the synthesis of structure- and morphology-controlled solids is being researched extensively. Use of green templates provides advantages in the form of easy processability and less toxicity compared to conventional chemical templates, in addition to customizable mesoporous network structures in solids. In this regard, the present work aimed at assessing the influence of choline chloride–zinc chloride ionic liquid (IL) in controlling the crystallite characteristics and improving the surface properties of sol–gel derived nanotitania. Thermal, surface area, porosity, crystallinity, chemical composition, textural and morphological characterizations of the IL templated titania are described in the present work. XRD results showed that all IL templated titania samples possessed anatase structure. The sample prepared using 2 mL of IL with 9 mL of titanium tetraisopropoxide (ILT-2) possessed uniformly dispersed, spherical particles with an average particle size of 13.2 nm and a surface area of 75.1 m2 g?1. A moderate red shift of the absorption profile of titania was also observed. Among the synthesized samples, ILT-2 exhibited the highest photocatalytic activity for the degradation of 4-chlorophenol under UV irradiation. The ability of the choline chloride–zinc chloride IL to offer very good control over the growth of titania particles together with its easy removal make it a potential green template for the sol–gel synthesis of mesoporous solids.
机译：广泛研究了利用有机模板来合成结构和形态控制的固体。与常规化学模板相比，绿色模板的使用具有易于加工和毒性低的优点，此外还具有可定制的固体中孔网络结构。在这方面，本研究旨在评估氯化胆碱-氯化锌离子液体（IL）在控制微晶特征和改善溶胶-凝胶衍生的纳米二氧化钛的表面性能方面的影响。 IL模板二氧化钛的热，表面积，孔隙率，结晶度，化学组成，结构和形态表征在本工作中进行了描述。 XRD结果表明，所有IL模板二氧化钛样品均具有锐钛矿结构。使用2 mL IL和9 mL四异丙醇钛（ILT-2）制备的样品具有均匀分散的球形颗粒，平均粒径为13.2 nm，表面积为75.1 m 2 g ？1 。还观察到二氧化钛吸收曲线的适度红移。在合成样品中，ILT-2对紫外线辐射下的4-氯苯酚降解表现出最高的光催化活性。氯化胆碱-氯化锌IL能够很好地控制二氧化钛颗粒的生长，并且易于去除，使其成为介孔固体溶胶-凝胶合成的潜在绿色模板。

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